astro.wikisort.org - Star

Search / Calendar

Delta1 Telescopii is a blue-white-hued binary star[5] system in the southern constellation of Telescopium. It is faintly visible to the naked eye, having an apparent visual magnitude of 4.94.[2] Based upon an annual parallax shift of 4.61 mas as seen from Earth,[1] this system is roughly 710 light-years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.29 due to interstellar dust.[4]

For other stars with this Bayer designation, see δ Telescopii.
Delta1 Telescopii
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 18h 31m 45.43288s[1]
Declination −45° 54′ 53.3166″[1]
Apparent magnitude (V) 4.94[2]
Characteristics
Spectral type B6 IV[3]
U−B color index −0.438[2]
B−V color index −0.121[2]
Astrometry
Proper motion (μ) RA: −3.75[1] mas/yr
Dec.: −27.43[1] mas/yr
Parallax (π)4.61 ± 0.19 mas[1]
Distance710 ± 30 ly
(217 ± 9 pc)
Absolute magnitude (MV)−0.74[4]
Orbit[5]
Period (P)18.8456 d
Eccentricity (e)0.51
Periastron epoch (T)2435003.693 JD
Argument of periastron (ω)
(secondary)		78°
Semi-amplitude (K1)
(primary)		65.0 km/s
Details
δ1 Tel A
Mass4.52±0.06[3] M☉
Radius4.7[6] R☉
Luminosity899[3] L☉
Temperature12,417[3] K
Rotational velocity (v sin i)11[3] km/s
Age178[4] Myr
Other designations
δ1 Tel, CD−45° 12550, HD 170465, HIP 90830, HR 6934, SAO 229092[7]
Database references
SIMBADdata

This system is a single-lined spectroscopic binary with an orbital period of 18.8 days and an eccentricity of 0.51.[5] The estimated size of the semimajor axis has a minimum of 14.5×106 km, with the uncertainty due to lack of a value for the orbital inclination.[8] The primary, component A, has a stellar classification of B6 IV,[3] suggesting it is an evolving B-type subgiant star. Delta1 Telescopii has an estimated 4.5[3] times the mass of the Sun and about 4.7[6] times the Sun's radius. It is radiating 899[3] times the solar luminosity from its photosphere at an effective temperature of 12,417 K.[3]


References


  1. van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
  2. Gutierrez-Moreno, Adelina; Moreno, Hugo (June 1968), "A photometric investigation of the Scorpio-Centaurus association", Astrophysical Journal Supplement, 15: 459, Bibcode:1968ApJS...15..459G, doi:10.1086/190168.
  3. Zorec, J.; Royer, F. (January 2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691, S2CID 55586789.
  4. Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035, S2CID 119108982.
  5. Pourbaix, D.; et al. (2004), "SB9: The Ninth Catalogue of Spectroscopic Binary Orbits", Astronomy & Astrophysics, 424: 727–732, arXiv:astro-ph/0406573, Bibcode:2004A&A...424..727P, doi:10.1051/0004-6361:20041213, S2CID 119387088.
  6. Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (3rd ed.), 367: 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
  7. "del01 Tel -- Spectroscopic binary", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2017-06-07.
  8. Buscombe, W.; Kennedy, P. M. (August 1962), "Two B-Type Spectroscopic Binaries", Publications of the Astronomical Society of the Pacific, 74 (439): 323, Bibcode:1962PASP...74..323B, doi:10.1086/127818.

На других языках

[de] Delta1 Telescopii

δ1 Telescopii (Delta1 Telescopii; kurz δ1 Tel) ist mit einer scheinbaren Helligkeit von 4,94m[2] ein dem bloßen Auge sehr lichtschwach erscheinender Stern des nur in südlicheren Breiten sichtbaren Sternbilds Teleskop. Nach im Dezember 2020 veröffentlichten Auswertungen der Messergebnisse der Raumsonde Gaia ist der Stern etwa 640 Lichtjahre von der Erde entfernt.[1] Der auf der Sichtlinie zwischen δ1 Telescopii und der Erde vorhandene interstellare Staub schwächt die scheinbare Helligkeit des Sterns wegen der Extinktion um ungefähr 0,29m.[6]
- [en] Delta1 Telescopii


Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.

Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.

2019-2025
WikiSort.org - проект по пересортировке и дополнению контента Википедии